You can even change the query that is used to retrieve data for the report. Parameters. You can use expressions in a parameter to vary the default value for the parameter. For example, you can use a parameter to filter data to a particular user based on the user ID that is used to run the report.
Platform as a service (PaaS) is a cloud computing model that delivers applications over the Internet. In a PaaS model, a cloud provider delivers hardware and software tools -- usually those needed for application development -- to its users as a service. A PaaS provider hosts the hardware and software on its own infrastructure.
IaaS is popular in the data center where software and servers are purchased as a fully outsourced service and usually billed on usage and how much of the resource is used - compared to the traditional method of buying software and servers outright. May also be called enterprise-level hosting platform. Sun Microsystems identifies Infrastructure as a Service (IaaS) as one of three layers of cloud computing, in addition to Software as a Service (SaaS) and Platform as a Service (PaaS).